Looks like he's leading in the seam on that rear 1/4 in the bodywork pic. Heating up poison will create hot smoke which many 'a bodyman huffed back in the day. My father being one of them. He's been pounding fenders for 54+ years. Still owns his shop at the young age of 75.
NO. It's the photo of the man with the differentials on the bench. White lead was used on screw threads before torquing. There's some on his hands, too. I'll bet he didn't wash them before eating his lunch.
Two of the photos have lead things going on.
In the bodywork photo toomanytoyzz mentioned, there's a bar of lead sitting on the wood block, and the guy is floating molten lead onto the quarter panel. Now that would be done with Bondo.
In the differential photo Steinmetz mentioned, Dutch Boy White Lead is being used in the assembly of the differential. Along with being used on screw threads as both a sealer and an anti-seize compound, in differential assembly, white lead was sometimes used in place of Prussian Blue for adjusting backlash, which could also explain the white lead on the guy's finger. It was also used as both a lubricant and a sealer for press-fitted parts, as a gasket coating or stand-alone sealer, as a lubricant on metalworking lathe dead centers, as a paint additive, and various other things.
Basically as versatile as it was hazardous...


I got a couple cool pics of my son sitting inside the tub of the '72 Landcruiser I'm restoring with my pop in the pic. It's sort of like passing the torch.